基于最优估计法的瑞利激光雷达反演大气温度研究  

Research on Atmospheric Temperature Retrieval Based on Rayleigh Lidar Using Optimal Estimation Method

作　　者：王煜 张献中 吴同 张益健 孙悦 李世杰 李欣岐 钟凯[1,2] 闫召爱 徐德刚[1,2] 姚建铨[1,2] WANG Yu;ZHANG Xianzhong;WU Tong;ZHANG Yijian;SUN Yue;LI Shijie;LI Xinqi;ZHONG Kai;YAN Zhaoai;XU Degang;YAO Jianquan(School of Precision Instrument and Optoelectronic Engineering,Tianjin University,Tianjin 300072;Key Laboratory of Optoelectronic Information Science and Technology(Ministry of Education),Tianjin University,Tianjin 300072;National Space Science Center,Chinese Academy of Sciences,Beijing 100190;University of Chinese Academy of Sciences,Beijing 100049)

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072 [2]天津大学光电信息技术教育部重点实验室,天津300072 [3]中国科学院国家空间科学中心,北京100190 [4]中国科学院大学,北京100049

出　　处：《空间科学学报》2023年第4期627-639,共13页Chinese Journal of Space Science

基　　金：国家自然科学基金项目资助(62175184)。

摘　　要：基于瑞利激光雷达的回波光子信号对中层大气进行探测,结合最优估计法,对大气温度进行反演。本文基于瑞利散射激光雷达方程建立正向模型,选择大气模型的温度廓线作为先验状态信息,构建用于最优化处理的成本函数,利用Levenberg-Marquardt最优化算法对成本函数执行最优化处理,得到大气温度的反演结果,对反演结果的不确定度分析的同时利用平均核矩阵对反演结果中真实信息的贡献进行评估。利用瑞利激光雷达方程产生的模拟回波信号进行了大气温度的反演处理与分析,对中国科学院国家空间中心提供的瑞利激光雷达实测数据进行大气温度的最优估计反演。结果表明,90 km以下的反演不确定度在10 K以内,且相较于CH方法,最优估计法具有反演有效范围高的优势;在回波光子信噪比较高的区域,反演不确定度较小,且真实信息对反演结果的贡献占主导地位。The middle atmosphere is detected based on the echo photon signal of Rayleigh lidar,combined with the optimal estimation method,the atmospheric temperature is retrieved.In this paper,the forward model is established based on the Rayleigh scattering lidar equation,the temperature profile of the atmospheric model is selected as the prior state information,and the cost function for optimization is constructed,and the cost function is optimized using the Levenberg-Marquardt optimization algorithm,get the inversion results of atmospheric temperature,and use the average kernel matrix to evaluate the contribution of the real information in the inversion results while analyzing the uncertainty of the inversion results.Using the simulated echo signal generated by the Rayleigh lidar equation,the inversion processing and analysis of the atmospheric temperature is carried out,and the optimal estimation inversion of the atmospheric temperature is carried out on the Rayleigh lidar measured data provided by the National Space Center of the Chinese Academy of Sciences.The results show that the inversion uncertainty below 90 km is within 10 K,and compared with the CH method,the optimal estimation method has the advantage of a higher inversion effective range;the inversion uncertainty is small,and the contribution of real information to the inversion results is dominant.

关 键 词：中层大气 瑞利激光雷达 最优估计法 平均核矩阵 

分 类 号：P356[天文地球—空间物理学]